Arunansu Sil

Nonzero

In the light of recent discovery of nonzero

θ_{13}

\theta_{13}

and leptogenesis in a type-I seesaw model with

, we have analyzed the Altarelli-Feruglio

A_4

A_4

symmetry

flavor symmetry model extended with additional flavon. The inclusion of the new field leads to the deviation from exact tri-bimaximal neutrino mixing pattern in the context of type-I see-saw by producing a nonzero

Neutrino masses and deviation from tribimaximal mixing in Δ(27) model with inverse seesaw mechanism

\theta_{13}

SQCD inflation & SUSY breaking

consistent with the recent experimental results at the leading order. A sum rule for light neutrino masses is also obtained in this context. The set-up constraints the two Majorana phases involved in the lepton mixing matrix in terms of

Spontaneous CP violation in lepton-sector: A common origin for

A_4

\theta_{13}

parameter space. We have shown that a nonzero lepton asymmetry can be generated while next-to-leading order contributions to the neutrino Yukawa couplings are considered. The two Majorana phases play crucial role in CP-asymmetry parameter and the involvement of

, the Dirac CP phase, and leptogenesis

\theta_{13}